C# 傳送郵件通知

阿新 • • 發佈：2020-07-23

web.config
   <!-- 配置發郵件：郵件訪問登入地址-->
    <add key="HttpsUrl" value="http://localhost:3334/Frame/Login.aspx" />
    <add key="IsSendMail" value="1" />
  <!--qq郵箱-->
    <add key="MailUser" value="[email protected]" />
    <add key="MailName" value="郵件通知" />
    <add key="MailHost 
" value="smtp.qq.com" />
    <add key="HostPort" value="25" />
 <!-- qq郵箱碼-->
     <add key="MailPwd" value="測試自己郵箱密碼" />

  公共方法 ConfigHelper


  public class ConfigHelper
    {
        /// <summary>
        /// 根據Key取Value值
        /// </summary>
        /// <param name="key"></param> 

        public static string GetValue(string key)
        {
            return ConfigurationManager.AppSettings[key].ToString().Trim();
        }

        /// <summary>
        /// 根據Key修改Value
        /// </summary>
        /// <param name="key">要修改的Key</param>
        /// <param name="value"> 
要修改為的值</param>
        public static void SetValue(string key, string value)
        {
            System.Xml.XmlDocument xDoc = new System.Xml.XmlDocument();
            xDoc.Load(HttpContext.Current.Server.MapPath("/XmlConfig/Config.xml"));
            System.Xml.XmlNode xNode;
            System.Xml.XmlElement xElem1;
            System.Xml.XmlElement xElem2;
            xNode = xDoc.SelectSingleNode("//appSettings");

            xElem1 = (System.Xml.XmlElement)xNode.SelectSingleNode("//add[@key='" + key + "']");
            if (xElem1 != null) xElem1.SetAttribute("value", value);
            else
            {
                xElem2 = xDoc.CreateElement("add");
                xElem2.SetAttribute("key", key);
                xElem2.SetAttribute("value", value);
                xNode.AppendChild(xElem2);
            }
            xDoc.Save(HttpContext.Current.Server.MapPath("/XmlConfig/Config.xml"));
        }

        /// <summary>
        /// 修改web.config的配置值
        /// </summary>
        /// <param name="key"></param>
        /// <param name="value"></param>
        public static void SetWebConfigValue(string key, string value) {
            Configuration objConfig = WebConfigurationManager.OpenWebConfiguration("~");

              AppSettingsSection objAppSettings = (AppSettingsSection)objConfig.GetSection("appSettings");
              if (objAppSettings != null) {
                  //刪除name，然後新增新值
                  objAppSettings.Settings.Remove(key);
                  objAppSettings.Settings.Add(key, value);

                  //儲存配置檔案
                  objConfig.Save();
              }
            
        
        }
    }

   傳送郵件
    /// <summary>
    /// 傳送郵件
    /// </summary>
    public class SMTPManager
    {
        public static string MailUser = ConfigHelper.GetValue("MailUser");
        public static string MailName = ConfigHelper.GetValue("MailName");
        public static string MailHost = ConfigHelper.GetValue("MailHost");
        public static string MailPwd = ConfigHelper.GetValue("MailPwd");
        public static string IsSendMail = ConfigHelper.GetValue("IsSendMail");
        public static string HostPort = ConfigHelper.GetValue("HostPort");
        public static string EnableSsl = ConfigHelper.GetValue("EnableSsl");
        /// <summary>
        /// 傳送郵件
        /// </summary>
        /// <param name="  sender">傳送人、支援傳送多個人每個地址用 ; 號隔開</param>
        /// <param name="Name">名稱</param>
        /// <param name="Describe">內容</param>
        /// <param name="File_Path">附件</param>
        /// <returns></returns>
        public static bool MailSending(string Sender, string Name, string Describe, string File_Path)
        {
            if(IsSendMail !="1")
            {
                return false;
            }
            try
            {
                MailAddress from = new MailAddress(MailUser, MailName); //郵件的發件人
                MailMessage mail = new MailMessage();

                //設定郵件圖片
                AlternateView htmlBody = AlternateView.CreateAlternateViewFromString(Describe, null, "text/html");
                LinkedResource lrImage = new LinkedResource(AppDomain.CurrentDomain.BaseDirectory + "/Themes/Images/"+ConfigHelper.GetValue("EmailPhoto"), "image/gif");
                lrImage.ContentId = "webimg"; //此處的ContentId 對應 htmlBodyContent 內容中的 cid: ，如果設定不正確，請不會顯示圖片   
                htmlBody.LinkedResources.Add(lrImage);
                mail.AlternateViews.Add(htmlBody);

                //設定郵件的標題
                mail.Subject = Name;//任務名稱

                //設定郵件的發件人
                //Pass:如果不想顯示自己的郵箱地址，這裡可以填符合mail格式的任意名稱，真正發mail的使用者不在這裡設定，這個僅僅只做顯示用
                mail.From = from;

                //設定郵件的收件人
                string address = "";
                string displayName = "";
                /**/
                /*  這裡這樣寫是因為可能發給多個聯絡人，每個地址用 ; 號隔開
                一般從地址簿中直接選擇聯絡人的時候格式都會是 ：使用者名稱1 < mail1 >; 使用者名稱2 < mail 2>; 
                因此就有了下面一段邏輯不太好的程式碼
                如果永遠都只需要發給一個收件人那麼就簡單了 mail.To.Add("收件人mail");
                */
                string[] mailNames = (Sender + ";").Split(';');
                foreach (string name in mailNames)
                {
                    if (name != string.Empty)
                    {
                        if (name.IndexOf('<') > 0)
                        {
                            displayName = name.Substring(0, name.IndexOf('<'));
                            address = name.Substring(name.IndexOf('<') + 1).Replace('>', ' ');
                        }
                        else
                        {
                            displayName = string.Empty;
                            address = name.Substring(name.IndexOf('<') + 1).Replace('>', ' ');
                        }
                        mail.To.Add(new MailAddress(address, displayName));
                    }
                }

                //設定郵件的抄送收件人
                //這個就簡單多了，如果不想快點下崗重要檔案還是CC一份給領導比較好
                //mail.CC.Add(new MailAddress("[email protected]", "尊敬的領導");

                //設定郵件的內容
                mail.Body = FormatDescribe(Describe);
                //設定郵件的格式
                mail.BodyEncoding = System.Text.Encoding.UTF8;
                mail.IsBodyHtml = true;
                //設定郵件的傳送級別
                mail.Priority = MailPriority.Normal;

                //設定郵件的附件，將在客戶端選擇的附件先上傳到伺服器儲存一個，然後加入到mail中
                if (File_Path != "")
                {
                    mail.Attachments.Add(new Attachment(File_Path));
                    mail.DeliveryNotificationOptions = DeliveryNotificationOptions.OnSuccess;
                } SmtpClient client = new SmtpClient();
                //設定用於 SMTP 事務的主機的名稱，填IP地址也可以了
                client.Host = MailHost;
                //設定用於 SMTP 事務的埠，預設的是 25
                client.Port = int.Parse(HostPort);
                client.EnableSsl = EnableSsl == "1" ? true : false;
                client.UseDefaultCredentials = false;
                //這裡才是真正的郵箱登陸名和密碼， 使用者名稱為 MailUser  密碼是 MailPwd
                string strMailPwd = MailPwd;
                client.Credentials = new System.Net.NetworkCredential(MailUser, strMailPwd.Trim());
                client.DeliveryMethod = SmtpDeliveryMethod.Network;

                ////如果傳送失敗，SMTP 伺服器將傳送 失敗郵件
                mail.DeliveryNotificationOptions = DeliveryNotificationOptions.OnFailure;

                //都定義完了，正式傳送了
                client.Send(mail);
                return true;
            }
            catch (Exception ex)
            {
                 throw new Exception(ex.Message);
            }
        }

        /// <summary>
        /// 格式化郵件內容
        /// </summary>
        /// <param name="Describe"></param>
        /// <returns></returns>
        public static string FormatDescribe(string Describe)
        {
            StringBuilder sb = new StringBuilder();
            sb.Append("<table cellSpacing=0 cellPadding=0 width=100% border=1>");

            sb.Append("<tr>");
            sb.Append("<td bgColor=#ffffff colSpan=4 height=25>【管理系統】</td>");
            sb.Append("</tr>");

            sb.Append("<TR>");
            sb.Append("<TD align=right width=9% bgColor=#eef7ff height=25>主 題</TD>");
            sb.Append("<TD id=title bgColor=#ffffff colSpan=3><FONT face=宋體>");
            sb.Append("管理郵件通知");
            sb.Append("</FONT></TD>");
            sb.Append("</TR>");

            sb.Append("<TR>");
            sb.Append("<TD align=right width=9% bgColor=#eef7ff height=250>內容</TD>");
            sb.Append("<TD id=title bgColor=#ffffff colSpan=3><FONT face=宋體>");
            sb.Append(Describe);
            sb.Append("</FONT></TD>");
            sb.Append("</TR>");
            sb.Append("</table>");

            return sb.ToString();
        }

        /// <summary>
        /// 傳送電子郵件
        /// </summary>
        /// <param name="smtpserver">SMTP伺服器</param>
        /// <param name="userName">登入帳號</param>
        /// <param name="pwd">登入密碼</param>
        /// <param name="nickName">發件人暱稱</param>
        /// <param name="strfrom">發件人</param>
        /// <param name="strto">收件人</param>
        /// <param name="subj">主題</param>
        /// <param name="bodys">內容</param>
        public static void SendMail(string smtpserver, string userName, string pwd, string nickName, string strfrom, string strto, string subj, string bodys)
        {
            try
            {
                SmtpClient _smtpClient = new SmtpClient();
                _smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network;//指定電子郵件傳送方式
                _smtpClient.Host = smtpserver;//指定SMTP伺服器
                _smtpClient.Credentials = new System.Net.NetworkCredential(userName, pwd);//使用者名稱和密碼

                //MailMessage _mailMessage = new MailMessage(strfrom, strto);
                MailAddress _from = new MailAddress(strfrom, nickName);
                MailAddress _to = new MailAddress(strto);
                MailMessage _mailMessage = new MailMessage(_from, _to);
                _mailMessage.Subject = subj;//主題
                _mailMessage.Body = bodys;//內容
                _mailMessage.BodyEncoding = System.Text.Encoding.Default;//正文編碼
                _mailMessage.IsBodyHtml = true;//設定為HTML格式
                _mailMessage.Priority = MailPriority.Normal;//優先順序
                _smtpClient.Send(_mailMessage);
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
        }
        
        
}